Sebastian Schöps » Conference

BMBF Sofa Kopplungsworkshop

Sebastian — Mon, 20 Jun 2011 19:06:43 +0000

Die Arbeitsgruppe für Angewandte Mathematik und Numerische Analysis an der Bergischen Universität Wuppertal veranstaltet am 1. Juli 2011, 13:00 – 16:00 im Rahmen des BMBF-Verbundprojekts SOFA (Gekoppelte Simulation und Optimierung für robustes virtuelles Fahrzeugdesign) einen Kopplungsworkshop. Herzlich eingeladen sind auch alle interessierten Studenten, Mitarbeiter und Industriepartner, die nicht zum Projekt gehören.

Zeit und Ort
Freitag, 1. Juli 2011, 13:00 – 16:00
Universität Wuppertal, Campus Wicküler Park, Seminarraum 4. OG

Programm:

12:00 – 13:00 Gemeinsames Mittagessen (optional)
13:00 – 14:00 Hauptvortrag (Dr. Timo Euler, CST AG): Coupled Simulations in High Frequency Electromagnetic Applications
14:00 – 14:10 Kaffeepause
14:10 – 14:30 Vortrag (Carsten Cimala, BUW, Elektrotechnik): Überblick zu den Arbeiten mit CST Studio Suite im Bereich Hochfrequenz
14:30 – 14:50 Vortrag (Sascha Baumanns, Universität zu Köln): Modelling and analysis of spatial discretized Maxwell’s equations for circuit simulation
14:50 – 15:00 Kaffeepause
15:00 – 15:20 Vortrag (Christoph Kaufmann, BUW, AG Numerik): Gekoppelte Simulation: Schaltung, Elektromagnetismus, und Thermik
15:20 – 15:40 Vortrag (Sebastian Schöps, BUW, AG Numerik): Higher Order Co-Simulation for Field/Circuit Coupling
15:40 – 16:00 Abschlussdiskussion

International Multi-Scale Workshop

Sebastian — Fri, 10 Dec 2010 23:00:08 +0000

CE School

I just came back from the “International Multi-Scale Workshop 2010″ in Darmstadt. I gave an invited talk on co-simulation (convergence of dynamic iteration schemes).

You can find the abstract of my talk and more information at the website of the Graduate School of Computational Engineering, Darmstadt.

SCEE 2010, Toulouse

Sebastian — Sat, 02 Oct 2010 21:36:55 +0000

SCEE Poster Presentation

The 8th conference on Scientific Computing in Electrical Engineering was held in Toulouse, organized by Onera. My contribution was a poster on “Multirate Time Integration of Field/Circuit Coupled Problems by Schur Complements” and I was co-author of the talk on “A modeling based preconditioned dynamic iteration scheme for coupled circuit-device problems” given by Markus Brunk. Here you find the abstract and poster:

Abstract: Strategies for Hierarchical Solving of Field/Circuit Coupled Problems
Poster: Multirate Time Integration of Field/Circuit Coupled Problems by Schur Complements
Preprint: Multirate Time Integration of Field/Circuit Coupled Problems by Schur Complements

ECMI 2010

Sebastian — Fri, 30 Jul 2010 13:52:54 +0000

Stadthalle

Today was the last day of the 16th European Conference on Mathematics for Industry that took place in the Historische Stadthalle in Wuppertal. As a member of the working group of applied math and numerical anaylsis, I was part of the local organizing committee.

I gave a talk in the minisymposium on Electromagnetic Field Computation about fitting reduced order models in magnetoquasistatic field problems (a continuation of my research presented in Essen) but also on the converegence of the scheme (slides 13ff).

Here you can find abstract and presentation

Abstract: Multirate Time-Integration with Reduced Order Models
Presentation: Multirate Time-Integration with Reduced Order Models

EPNC 2010, Essen

Sebastian — Sat, 03 Jul 2010 19:17:00 +0000

The Symposium on Electromagnetic Phenomena in Nonlinear Circuits (EPNC) 2010 was this year in Essen. – A stone’s throw from Wuppertal. I gave another talk on co-simulation. Here the method was applied to an induction motor, as shown in the figure on the right. The coupling is given by extracted inductances, similarily to the method presented at the Compumag 2009. This time the focus was on signal processing; the waveforms are smoothed to allow for large time steps.

Here you can find the presentation

Abstract: Fitting Lumped Machine Models on the Fly
Presentation: Fitting Lumped Machine Models on the Fly

ECMI 2010, Wuppertal

Sebastian — Fri, 01 Jan 2010 09:29:50 +0000

My institute organizes from July 26-30, 2010 the next European Conference on Mathematics for Industry (ECMI). The conference is following up ECMI – 2008 in London, UK. As all ECMI conferences, ECMI 2010 will emphasize the role of mathematics as a unique overarching industrial resource.

The registration is open from January, 10th.

Compumag 2009, Florianópolis

Sebastian — Tue, 01 Dec 2009 15:14:33 +0000

Compumag 2009 Plenary

I attended the Compumag 2009 in Florianópolis supported by a travel grant from the DAAD (German Academic Exchange Service). At the conference I showed a nice application of my latest research on co-simulation (together with Andreas Bartel and Herbert De Gersem). The theory is based on the work of Arnold/Günther: “Preconditioned dynamic iteration for coupled differential-algebraic systems” published in BIT Numerical Mathematics.

The given application is a multirate framework for the efficient simulation of field/circuit coupled problems. Within this framework, a guarantee for convergence and stability was given by PDAE analysis. It was shown that different time step sizes in different parts of the model can be automatically chosen according to the problem’s dynamics. Finally a finite element model of a transformer coupled to a circuit was given to illustrate the efficiency of the multirate method.

The talk was awarded with a COMPUMAG best paper commendation.

Presentation: A Co-Simulation Framework for Multirate Time-Integration of Field/Circuit Coupled Problems
Paper: A Cosimulation Framework for Multirate Time Integration of Field/Circuit Coupled Problems (published in IEEE Transactions on Magnetics)

SCEE in Finland

Sebastian — Fri, 10 Oct 2008 11:09:21 +0000

I’m back from the SCEE 2008 (Scientific Computing in Electrical Engineering) Conference in Espoo, Finland.
The picture on the left is given to illustrate my coupling approach during my talk about circuits refined by 3-D conductor models. The circuit is given in terms of the modified nodal analysis and the field is discretized by the finite integration technique. The coupled system is introduced and analyzed; numerical results are obtained by co-simulation (“weak coupling”) and monolithic coupling (“strong”). The basic ideas are taken from my master thesis, but there are new additional theoretical and numerical results.
Here you can find the presentation and the preprint of the paper.

Abstract: Co-Simulation of Circuits Reﬁned by 3-D Conductor Models
Presentation: Simulation of Lumped Electric Circuits Refined by 3-D Magnetoquasistatic Conductor Models
Preprint: DAE-Index and Convergence Analysis of Lumped Electric Circuits Refined by 3-D Magnetoquasistatic Conductor Models (published in SCEE 2008 by Springer)